<SEC-DOCUMENT>0001013594-18-000316-index.html : 20180423 <SEC-HEADER>0001013594-18-000316.hdr.sgml : 20180423 <ACCEPTANCE-DATETIME>20180423151459 ACCESSION NUMBER: 0001013594-18-000316 CONFORMED SUBMISSION TYPE: SC 13G PUBLIC DOCUMENT COUNT: 2 FILED AS OF DATE: 20180423 DATE AS OF CHANGE: 20180423 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: GEOSPACE TECHNOLOGIES CORP CENTRAL INDEX KEY: 0001001115 STANDARD INDUSTRIAL CLASSIFICATION: MEASURING & CONTROLLING DEVICES, NEC [3829] IRS NUMBER: 760447780 STATE OF INCORPORATION: TX FISCAL YEAR END: 0930 FILING VALUES: FORM TYPE: SC 13G SEC ACT: 1934 Act SEC FILE NUMBER: 005-52075 FILM NUMBER: 18768742 BUSINESS ADDRESS: STREET 1: 7007 PINEMONT DR. CITY: HOUSTON STATE: TX ZIP: 77040 BUSINESS PHONE: 7139864444 MAIL ADDRESS: STREET 1: 7007 PINEMONT DR. CITY: HOUSTON STATE: TX ZIP: 77040 FORMER COMPANY: FORMER CONFORMED NAME: OYO GEOSPACE CORP DATE OF NAME CHANGE: 19950919 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: Nierenberg Investment Management Company, Inc. CENTRAL INDEX KEY: 0001282683 IRS NUMBER: 911677205 STATE OF INCORPORATION: WA FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G BUSINESS ADDRESS: STREET 1: 19605 NE 8TH ST CITY: CAMAS STATE: WA ZIP: 98607 BUSINESS PHONE: 360-604-8600 MAIL ADDRESS: STREET 1: 19605 NE 8TH ST CITY: CAMAS STATE: WA ZIP: 98607 FORMER COMPANY: FORMER CONFORMED NAME: NIERENBERG INVESTMENT MANAGEMENT CO DATE OF NAME CHANGE: 20040304 </SEC-HEADER> <DOCUMENT> <TYPE>SC 13G <SEQUENCE>1 <FILENAME>geospace13g-042318.htm <DESCRIPTION>APRIL 23, 2018 <TEXT> Document 1 - file: geospace13g-042318.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-99.1 <SEQUENCE>2 <FILENAME>geospaceex991-042318.htm <DESCRIPTION>JOINT FILING AGREEMENT (RESTATED) <TEXT> Document 2 - file: geospaceex991-042318.htm
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